P2623 OBD Error Code: Problem & Solutions

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Do you want to know more about P2623 error code? Then keep reading further. This error code is usually known as the injector control pressure regulator circuit/open. The oil pressure which lies out of the high-pressure oil pump is controlled by the injector control pressure regulator. The injector will malfunction if the oil pressure is too low. As the engine keeps running, the PCM will look after the fuel pressure. The P2623 error will be stored, if an erratic signal is sent by the oil pressure regulator.

The PCM will look after the injector control pressure regulator circuit. The error code will be set by the PCM if the injector control pressure regulator circuit goes out of factory specifications.

What causes this problem with the Injector Control Pressure Regulator Circuit/Open?

• The injector control pressure regulator might be defective.
• There might be an opening in the injector control pressure regulator or the circuit might be shorted.
• The electrical connection of the injector control pressure regulator circuit might appear to be weak

1. Powertrain Control Module - Illumination of the check engine light is a common symptom of faulty PCM. Change it immediately.
2. Throttle Position Sensor - Intermittent flashing of the check engine light will occur if the throttle position sensor is damaged. Replace it with a new one from Parts Avatar.
3. Throttle Body - Poor idle by the vehicle indicates that the throttle body is damaged. Get it replaced to avoid the P2623 error code.
4. Fuel Injector - Difficulty in starting your vehicle indicates that the fuel injector is damaged. Replace it as soon as possible.
5. High-Pressure Oil Pump - Uneven idle after a heavy acceleration is a sign of damaged high-pressure oil pump. Get rid of it as soon as possible.
6. Injection Pump Regulator - Facing troubles with your faulty injection pump regulator? Then it’s high time to get a new injection pump regulator from Parts Avatar.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2623 here:

Common Symptoms

• The vehicle will not start
• Stalling of the engine.

Want to correct the Trouble Code P2623? Read these points mentioned below:

• The throttle body, fuel injectors and injection pump regulator must be visually examined for any possible faults or damages.
• Replace these components quickly if they are found to be defective.

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2623 code to be stored:

• A low voltage signal of 5 volts is sent to the injector control pressure sensor.
• The low signal is then grounded through the sensor.
• The sensor resistance will decrease when the injector control pressure increases, which in turn increases the voltage input signal to the PCM.
• In order to check the injector control oil pressure continuously, the PCM is programmed to check the minimum and maximum voltage reading from the injector control pressure sensor.
• Multiple tools will be needed to diagnose this error and find out how this error got stored in your vehicle.
• To diagnose this issue, a scanner and DVOM is needed.
• The service manual is needed to correctly diagnose this issue.
• Begin your diagnosis by visually inspecting every wires and connectors with a scanner.
• The damaged and defective wires and connectors have to be replaced as needed.
• After inspecting them, clear all codes and retest the vehicle to see if any malfunctioning has occurred. After every component works properly, recover the codes and freeze frame data by connecting a scanner to the vehicle.
• Test drive your vehicle and you will find an irregular condition if the error does not come immediately.
• Each time a repair is done, double check the entire process to make sure it’s successful.
• After inspecting them, clear all codes and retest the vehicle to see if any malfunctioning has occurred.
• If the code fails to return quickly, the erratic condition may prevail.
• In one such situation, you have to worsen the condition of the vehicle before proceeding for further diagnosis as this is a challenging task.
• The injector control pressure sensor or injector control pressure regulator can be faulty if the injector control pressure goes high.
• Change the damaged components.
• Clear the error codes and activate the engine to normal operating temperature to make sure the repair is successful.
• Fix a scanner or code reader to check the condition of the low injector control pressure and note down all the trouble codes and freeze frame data that is stored.
• Turn off the engine and clear the error codes.
• Attach a manual oil pressure gauge to the injector control passage.
• Check for leaks by starting the engine.
• Make it reach a normal operating temperature and write down the actual injector control pressure reading during idle condition 1200 RPM and 2500 RPM.
• Compare your readings with the manufacturer’s and perform repair works as needed.
• Clear the error codes and start the engine to normal operating temperature to make sure the repair is successful.
• Detach the injector control pressure connector and carry out a resistance test on the sensor if the injector control pressure lies within specifications.
• Compare your readings with the manufacturer’s and change the injector control pressure sensor as necessary.
• The sensor can be faulty if the electrical connector face of the injector control pressure sensor is polluted with engine oil and replace it quickly.
• Carry out a continuity or resistance test on all wires by disconnecting the PCM connector if the sensor lies within the acceptable specification.
• Compare your readings with the manufacturer’s specification and fix the open or shorted wires if needed.
• Failure of the PCM is very rare and it must be reprogrammed before replacing it.

Common Mistakes When Diagnosing the P2623 Code

• Faulty high-pressure oil pump.
• Electrical wires might cause some trouble.
• Failure of the injection pump regulator.